ADP5051 Datasheet

• Wide input voltage range: 4.5 V to 15.0 V
• ±1.5% output accuracy over full temperature range
• Adjustable/fixed output options via factory fuse or I²C interface
• I²C interface with interrupt on fault conditions
• Power regulation
  Channel 1 and Channel 2: programmable 1.2 A/2.5 A/4 A sync buck regulators with low-side FET driver
  Channel 3 and Channel 4: 1.2 A sync buck regulators
• 250 kHz to 1.4 MHz adjustable switching frequency
• Single 8 A output (Channel 1 and Channel 2 in parallel)
• Dynamic voltage scaling (DVS) for Channel 1 and Channel 4
• Precision enable with 0.8 V accurate threshold
• Programmable phase shift in 90° steps
• Individual channel FPWM/PSM selection
• Frequency synchronization input or output
• See data sheet for additional features

• Small cell base stations
• FPGA and processor applications
• Security and surveillance
• Medical applications

The ADP5051 combines four high performance buck regulators, and a supervisory circuit with a voltage monitor, watchdog, and manual reset in a 48-lead LFCSP package that meets demanding performance and board space requirements. The device enables direct connection to high input voltages up to 15.0 V with no preregulators.

Channel 1 and Channel 2 integrate high-side power MOSFET and low-side MOSFET drivers. In low-side power devices, use external NFETs to achieve an efficiency optimized solution and deliver a programmable output current of 1.2 A, 2.5 A, or 4 A.

Combining Channel 1 and Channel 2 in a parallel configuration provides a single output with up to 8 A of current. Channel 3 and Channel 4 integrate both high-side and low-side MOSFETs to deliver an output current of 1.2 A.

The ADP5051 supervisory circuits monitor voltage level. The watchdog timer generates a reset when the WDI does not toggle within a preset timeout period. Select manual reset functionality via the processor reset mode or system power on/off switch mode.

The optional I²C interface offers flexible configurations, including adjustable and fixed output voltage, junction temperature overheat warning, low input voltage detection, and dynamic voltage scaling.